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| author | Svyatoslav Ryhel <clamor95@gmail.com> | 2024-01-08 18:45:01 +0200 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2024-04-21 09:04:03 +0200 |
| commit | 25ca3314fbc6ad2c55201792605038aa491d1548 (patch) | |
| tree | 21f9d88a6a05ef38de3f9e81a9d851e6ce24a0e7 /drivers/video | |
| parent | 02bb9976e1d4412f122f2c5dfebe689f8160805d (diff) | |
| download | u-boot-25ca3314fbc6ad2c55201792605038aa491d1548.tar.gz u-boot-25ca3314fbc6ad2c55201792605038aa491d1548.tar.bz2 u-boot-25ca3314fbc6ad2c55201792605038aa491d1548.zip | |
video: simple_panel: add EDID support
Support timing parsing from EDID if panel device tree node
provides DDC i2c bus instead of timings node.
Tested-by: Robert Eckelmann <longnoserob@gmail.com> # ASUS TF201
Tested-by: Agneli <poczt@protonmail.ch> # Toshiba AC100 T20
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
[agust: reworked to fix dm_i2c_* build errors and to big img size]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/simple_panel.c | 66 |
1 files changed, 64 insertions, 2 deletions
diff --git a/drivers/video/simple_panel.c b/drivers/video/simple_panel.c index 064c113d2d..76a30427a5 100644 --- a/drivers/video/simple_panel.c +++ b/drivers/video/simple_panel.c @@ -7,12 +7,16 @@ #include <common.h> #include <backlight.h> #include <dm.h> +#include <edid.h> +#include <i2c.h> #include <log.h> #include <mipi_dsi.h> #include <panel.h> #include <asm/gpio.h> #include <power/regulator.h> +#define EDID_I2C_ADDR 0x50 + struct simple_panel_priv { struct udevice *reg; struct udevice *backlight; @@ -49,13 +53,71 @@ static int simple_panel_set_backlight(struct udevice *dev, int percent) return 0; } +#if CONFIG_IS_ENABLED(I2C_EDID) && CONFIG_IS_ENABLED(DM_I2C) +static int simple_panel_get_edid_timing(struct udevice *dev, + struct display_timing *timings) +{ + struct udevice *panel_ddc, *panel_edid; + struct display_timing edid_timing; + u8 edid_buf[EDID_SIZE] = { 0 }; + int ret, bpc; + /* Check for DDC i2c if no timings are provided */ + ret = uclass_get_device_by_phandle(UCLASS_I2C, dev, + "ddc-i2c-bus", + &panel_ddc); + if (ret) { + log_debug("%s: cannot get DDC i2c bus: error %d\n", + __func__, ret); + return ret; + } + + ret = dm_i2c_probe(panel_ddc, EDID_I2C_ADDR, 0, &panel_edid); + if (ret) { + log_debug("%s: cannot probe EDID: error %d\n", + __func__, ret); + return ret; + } + + ret = dm_i2c_read(panel_edid, 0, edid_buf, sizeof(edid_buf)); + if (ret) { + log_debug("%s: cannot dump EDID buffer: error %d\n", + __func__, ret); + return ret; + } + + ret = edid_get_timing(edid_buf, sizeof(edid_buf), + &edid_timing, &bpc); + if (ret) { + log_debug("%s: cannot decode EDID info: error %d\n", + __func__, ret); + return ret; + } + + memcpy(timings, &edid_timing, sizeof(*timings)); + + return 0; +} +#else +static int simple_panel_get_edid_timing(struct udevice *dev, + struct display_timing *timings) +{ + return -ENOTSUPP; +} +#endif + static int simple_panel_get_display_timing(struct udevice *dev, struct display_timing *timings) { const void *blob = gd->fdt_blob; + int ret; + + /* Check for timing subnode if panel node first */ + ret = fdtdec_decode_display_timing(blob, dev_of_offset(dev), + 0, timings); + if (!ret) + return ret; - return fdtdec_decode_display_timing(blob, dev_of_offset(dev), - 0, timings); + return simple_panel_get_edid_timing(dev, timings); } static int simple_panel_of_to_plat(struct udevice *dev) |